#include <bits/stdc++.h>
using namespace std;

int main() {
  int n, m;
  cin >> n >> m;

  int g[55][55];
  for (int i=0; i<m; i++) {
    int a, b;
    cin >> a >> b;
    g[a][b] = g[b][a] = 1;
  }

  int cnt = 0;
  for (int i=0; i<n; i++) {
    for (int j=i+1; j<n; j++) {
      for (int k=j+1; k<n; k++) {
        for (int l=k+1; l<n; l++) {
          int d1 = g[i][j] + g[i][k] + g[i][l];
          int d2 = g[j][i] + g[j][k] + g[j][l];
          int d3 = g[k][i] + g[k][j] + g[k][l];
          int d4 = g[l][i] + g[l][j] + g[l][k];
          if (d1 == 2 && d2 == 2 && d3 == 2 && d4 == 2) cnt++;
        }
      }
    }
  }

  printf("%d\n", cnt);
  return 0;
}